Kiko Casilla made his Champions League debut as Real Madrid beat Shakhtar 4-3 in the Lviv Arena on Wednesday.
His appearance in Europe's premier cup competition came on the back of his La Liga debut for Los Blancos, in a 3-1 win against Las Palmas at the end of October, and subsequent appearance against Sevilla.
"I am very happy for having been able to make my debut," he said after the game. "I did not speak with [coach Rafa] Benitez, I don't have to ask for explanations.
"I'm still working hard. I am not satisfied [with not playing as much as I'd like], but I have to be realistic.
"Real Madrid is the best side in the world. We know that we always have to win and that motivates us to be at our top level. Our aim is to compete for everything. We are on the right path and everyone in the dressing room wants the run to continue."
Casilla made his international debut against Germany last November while an Espanyol player, and he still harbours dreams of playing for Spain again, having returned to the club where he started his career.
He added: "I still have the dream of playing with Spain even though when I came to Madrid I wasn't called 2-3 times.
"But coming back to Madrid has been a dream come true. I never lost hope of returning home. The welcome from team-mates and coaches was fantastic. Everyone has been great. This dressing room is magnificent and my team-mates are brilliant and [they are] humble people."
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